Mass Transfer Mechanisms for CO2 Storage and Enhanced Oil Recovery in Shale Oil Reservoirs
编号:488 访问权限:仅限参会人 更新:2022-05-20 10:00:27 浏览:719次 口头报告

报告开始:2022年05月26日 16:20 (Asia/Shanghai)

报告时间:20min

所在会议:[S1] Resource Development and Utilization » [S1-1] Resource Development and Utilization-Session 1

暂无文件

摘要
CO2 injection in shale oil/gas reservoirs is a feasible method for CO2 geological sequestration and enhanced oil recovery. However, the mass transfer mechanisms in inorganic pores and organic matter (kerogen) are still ambiguous. Thus, the mechanisms of diffusion and adsorption were experimentally and numerically investigated. A novel adsorption-diffusion model was proposed for mass transfer of CO2 and oil in shale reservoirs. Mathematical models for hydrocarbon mass transfer in cylindrical shaped shale and limestone samples were derived. The predicted responses of the mathematical models closely matched the experimental data of CO2 injection experiments performed on various shales and tight rocks under high pressure and high temperature conditions. Hydrocarbon recovery of shales shows a delayed effect compared to tight rocks due to the adsorption and diffusion in kerogen. Hydrocarbons were extracted out of the bulk kerogen and then diffused through the inorganic and organic pores. Hydrocarbon diffusion coefficients and mass transfer rate coefficients for shale samples were obtained by matching experiments and mathematical models. Hydrocarbon diffusion coefficients in limestone were obtained. Both diffusion coefficients and extraction rate coefficients decreased exponentially with carbon numbers. The extraction rate coefficients decreased exponentially because the diffusion coefficients of hydrocarbons in kerogen also decreased exponentially with carbon numbers. This research advances the mass transfer theories and promotes the CO2 storage and enhanced oil recovery in shale formations.
关键字
报告人
Shaojie ZHANG
China University of Mining and Technology

Dr. Shaojie Zhang is an Assistant Professor in the Department of Geology at China University of Mining and Technology. Dr. Zhang joined China University of Mining and Technology in 2021 after earning my Ph.D. degree in Petroleum Engineering from the University of North Dakota. He has 8 years of research experience in petroleum geology, oil/gas development, CO2 storage in shale and coal, and transport in porous media using experiments and numerical simulations. He published more than 10 papers in different journals, including Fuel, Chemical Engineering Journal, Journal of Natural Gas Science and Engineering, and International Journal of Coal Geology, etc.

发表评论
验证码 看不清楚,更换一张
全部评论
登录 注册缴费 提交稿件 酒店预订